#include<stdio.h>
int main()
{
	void actionl(int, int), action2(int, int);
	char ch;
	int a = 15, b = 23;
	ch = getchar();
	switch (ch)
	{
	case'a':
	case'A':actionl(a, b); break;
	case'b':
	case'B':action2(a, b); break;


	default:putchar('\a');

	}
	return 0;
}
void actionl(int x, int y)
{
	printf("x+y=%d\n", x + y);

}
void action2(int x, int y)
{
	printf("x*y=%d\n", x * y);

}
